To want to have something very much, especially something that belongs to someone else. (Collins Dictionary)
To desire wrongfully, inordinately, or without due regard for the rights of others: (Dictionary.com)
To wish for, especially eagerly: (Dictionary.com)
To wish for earnestly. (Merriam – Webster)
To desire (what belongs to another) inordinately or culpably. (Merriam – Webster)
If you covet something, you strongly want to have it for yourself. (Collins Dictionary)
Desire, Lust, and Coveting: It’s All the Same Word!
Fighting Covetousness by Looking at Others.